Synthesis of ATRP macroinitiator based on synthetic cis-1,4-polyisoprene and its application for graft polymerization of MMA
| Autor: | Daniel Derouet, Pranee Phinyocheep, Lapporn Vayachuta, Sagrario Pascual |
|---|---|
| Přispěvatelé: | Unité de chimie organique moléculaire et macromoléculaire (UCO2M), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC) |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics General Chemical Engineering Industrial chemistry 02 engineering and technology Polymer 021001 nanoscience & nanotechnology Poly(methyl methacrylate) [CHIM.POLY]Chemical Sciences/Polymers 020401 chemical engineering chemistry Polymerization visual_art Polymer chemistry visual_art.visual_art_medium Organic chemistry 0204 chemical engineering Physical and Theoretical Chemistry 0210 nano-technology ComputingMilieux_MISCELLANEOUS |
| Zdroj: | e-polymers e-polymers, De Gruyter, 2010, pp.1-12 |
| ISSN: | 1618-7229 |
| Popis: | Modification of synthetic cis-1,4-polyisoprene (PI) into bromoalkylfunctionalized polyisoprene (PIBr), an ATRP macroinitiator, was investigated by two-step chemical reaction. The PI was partially epoxidized into epoxidized polyisoprene (EPI) using m-chloroperbenzoic acid, then the EPI was transformed into PIBr by reaction with 2-bromo-2-methylpropionic acid. The results from 1H NMR revealed that the addition product occurs in competition with epoxide ring rearrangement. The amount of bromoalkyl functionalized units was determined from 1H NMR spectra. The graft polymerization of MMA using ATRP technique from macroinitiator units in PIBr was investigated using three different ligands, i.e. N-(n-octyl)-2-pyridylmethanimine (NOPMI), N-(n-octadecyl)-2-pyridylmethanimine (NODPMI) and 1,1,4,7,7-pentamethyldiethylenetriamine (PMDETA), resulting in formation of graft copolymer of PI and PMMA. The PMMA grafts were successfully separated from the PI backbone using acidolysis for studying their number-average molecular weights (M̄̅̅n,SEC ) and polydispersity indexes (PDI). All of the ligands used give a increase of M̄̅̅n with MMA conversion. Comparing between 3 ligands, Cu(I)Br complexed with NOPMI shows first-order kinetic plot. |
| Databáze: | OpenAIRE |
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